How much force does a kangaroo tail have?

There is a very wide variety of tail length for kangaroos, given that there are over 60 species.

The largest species of kangaroo, the Red kangaroo, has an estimated tail length of between 88 and 106cm. This is the equivalent of 34-42 inches (less than four feet).

The smallest species of kangaroo, the Musky rat kangaroo, has an estimated tail length of 14 cm. This species has a head-and-body length of just 23 cm.